Thank you very much for giving the game a try! I absolutely agree that the game needs a tutorial… unfortunately I was literally getting features to work all the way to zero hour (in fact, the enemy AI wasn’t written until maybe 2 hours before I uploaded). I am happy you seem to have figured the game out, though!
Also, just for full disclosure… I obtained the music from sources on OpenGameArt. The attributions should have been included in a text file with the game.
Again, thank you! :D